"You killer! You killed my brother! Go to hell!" the man shouted, according to reporters in the room.

The shoe reportedly missed the accused, Anders Breivik, but clipped one of his lawyers, Vibeke Hein. The incident was met with applause by some in the audience.

Breivik has confessed to killing 77 people - a majority of them teenagers - in a bombing and shooting rampage last summer but claimed it was an act of self-defense and the first move in a new crusade against "multi-culturalism" in Europe.

In a 1,500-page manifesto posted online before the attack, Breivik claims to have been just one operative in a group called the new Knights Templar that would lead a violent conservative Christian revolution - a battle that, by Breivik's prediction, would last 60 years.

Last month, the extremist testified that his original plan also included the beheading of the Norwegian Prime Minister and the bombing of Norway's royal palace. Early in the trial Breivik teared up, but not apparently for his victims. He started to weep when the court showed a propaganda video he had created.